Changeset 5913 for trunk/MagicSoft/TDAS-Extractor/Algorithms.tex

Timestamp:

01/20/05 16:20:48 (20 years ago)

Author:

gaug

Message:

*** empty log message ***

File:

• trunk/MagicSoft/TDAS-Extractor/Algorithms.tex (modified) (4 diffs)

trunk/MagicSoft/TDAS-Extractor/Algorithms.tex

@@ -195 +195 @@
 It loops twice over all pixels in every event, because it has to find the reference point, first. 
 As it does not correct for the clock-noise, only an even number of samples is allowed.
-
+For a high intensity calibration run causing high-gain saturation in the whole camera, this 
+extractor apparently fails since only dead pixels which cannot produced a saturated signal, are taken into account 
+in the peak search. For this special case, we modified {\textit{\bf MExtractFixedWindowPeakSearch}} 
+such to define the peak search window as the one starting from the mean position of the first saturating slice.
+\par
 The following  adjustable parameters have to be set from outside: 
 \begin{description}
@@ -213 +217 @@
   \includegraphics[width=0.49\linewidth]{MExtractFixedWindowPeakSearch_23Led_Blue.eps}
 \caption[Sketch extraction ranges MExtractFixedWindowPeakSearch]{%
-Sketch of the extraction ranges for the extractor {\textit{MExtractFixedWindowPeakSearch}} 
+Sketch of the extraction ranges for the extractor {\textit{\bf MExtractFixedWindowPeakSearch}} 
 for two typical calibration pulses (pedestals have been subtracted) and a typical inner pixel.
-The pulse would be shifted half a slice to the right for an outer pixels. }
+The pulse would be shifted half a slice to the right for an outer pixel. }
 \label{fig:fixedwindowpeaksearchsketch}
 \end{figure}
@@ -224 +228 @@
 the charge at the same time and for the same pulse. 
 All treated combined extractors here derive from the MARS-base
-class {\textit{MExtractTimeAndCharge}} which provides the following facilities:
+class {\textit{\bf MExtractTimeAndCharge}} which itself derives from MExtractor and MExtractTime. 
+It provides the following facilities:
 
 \begin{itemize}
-\item Only one loop over all pixels is performed
+\item Only one loop over all pixels is performed.
 \item The individual FADC slice values get the clock-noise-corrected pedestals immediately subtracted.
 \item The low-gain extraction range is adapted dynamically, based on the computed arrival time 
-    from the high-gain samples
+    from the high-gain samples.
 \item Extracted times from the low-gain samples get corrected for the intrinsic time delay of the low-gain
-    pulse
-\item The global extraction limits can be set from outside
-\item FADC saturation is kept track of
+    pulse.
+\item The global extraction limits can be set from outside.
+\item FADC saturation is kept track of.
 \end{itemize}
 
-The following free adjustable parameters have to be set additionally from outside: 
+The following adjustable parameters have to be set from outside, additionally to those declared in the 
+base classes MExtractor and MExtractTime:
+ 
 \begin{description}
 \item[Global extraction limits:\xspace] Limits in between which the extractor is allowed 
@@ -692 +699 @@
 %%% TeX-master: "MAGIC_signal_reco"
 %%% TeX-master: "MAGIC_signal_reco"
+%%% TeX-master: "MAGIC_signal_reco"
 %%% End: